6666660707 has 4 divisors (see below), whose sum is σ = 7619040816. Its totient is φ = 5714280600.

The previous prime is 6666660673. The next prime is 6666660713. The reversal of 6666660707 is 7070666666.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 6666660707 - 2⁶ = 6666660643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6666660727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 476190044 + ... + 476190057.

It is an arithmetic number, because the mean of its divisors is an integer number (1904760204).

Almost surely, 2^6666660707 is an apocalyptic number.

6666660707 is a deficient number, since it is larger than the sum of its proper divisors (952380109).

6666660707 is an equidigital number, since it uses as much as digits as its factorization.

6666660707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952380108.

The product of its (nonzero) digits is 2286144, while the sum is 50.

The square root of 6666660707 is about 81649.6215974085. The cubic root of 6666660707 is about 1882.0714969358.

The spelling of 6666660707 in words is "six billion, six hundred sixty-six million, six hundred sixty thousand, seven hundred seven".